Draft-producer



(No Mode-,1.)

J. A. CLINTON; DRAFT PRODUCER.

Patented May 19, 1896.

INVENTOI? WITNESSES.

ATTORNEYS ANDREW EGRMIAM.PHOTO'UTNQWASKINEI'DN. II C.

UNITED STATES PATENT OFFICE,

JAMES A. CLINTON, OF BROOKLYN, NEYV YORK.

DRAFT-PRODUCER,

SPECIFICATION forming part of Letters Patent No. 560,475, dated May 19,1896.. Application filed August 10,1895- Serial No. 558,943. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES A. CLINTON, a citizen of the UnitedStates,residing in Brooklyn, Kings county, New York, have inventedcertain new and useful Improvements in Draft-Producers, of which thefollowing is a specification.

My invention relates to draft-producers, and has for its object theconstruction of an improved mechanism for creating a heavy and regulardraft in engine-furnaces.

Referring to the accompanying drawings, Figure 1 is a sectional view ofthe smoke-stack of an engine, showing my invention applied thereto. Fig.2 is a plan View of the same, taken from the top and showing thefan-beat ers; and Fig. 3 is a similar View taken from the bottom,showing the propeller-wheel and arrangement of fastening the device tothe smoke-stack.

A represents a cylinder, which is adapted to be placed bodily in asmoke-stack A of any ordinary construction,but preferably one providedwith an enlarged portion A at its upper end. The invention is shownherein as applied to the smoke-stack of an engine where it may beoperated by the exhaust-steam; but it is to be understood that it ispreferred to operate it with live steam from the boiler, the lattergiving far better and different results than heretofore attained. Theupper end of the cylinder A is closed by a cap a, and near the lower endof the cylinder are arranged supporting-arms a, which meet in a commoncenter piece, which is so constructed as to form a bearingsurface C0 Thecylinder A is closed at its lower end bya cap-pieoe a The steamsupplypipe 0 enters the cylinder through this cap -piece a An upright hollowshaft b, closedv at its lower end and sharpened to a point Z) orotherwise arranged for turning in the bearing-surface a at the center ofthe supporting-arms a, extends upward through the bearing in cap a andat its upper end carries a plurality of horizontally-projecting arms 0.The arms 0 are hollow, but closed at their outer ends, and the upper endof shaft 1) is closed, so that it opens only into each arm 0 c, &c.Shaft 12, at one or more points below cap a, is pierced by inlet-holes bb, and each horizontal arm 0 is pierced in one or more places,preferably three, as shown by outlet-holes c c c on the side of the arm.The purpose of these holes will presently more fully appear. Upon thelower end of shaft Z), immediately above the supporting-arms a, ismounted a screw propeller-wheel d, which fits within the interior of thecylinder A, whereby when steam passes through the latter the wheel willbe rotated and motion imparted to shaft 17 and horizontal arms 0. Wings6 e are hung upon the upper end of shaft 2) immediately below thehorizontal arms. These wings are shaped somewhat similarly to the bladesof a propeller, and are placed upon the shaft for the purpose ofcreating a draft when the shaft is rotated, and are placed below thehorizontal arms for the reason that the air and products of combustionwill be given an upward impetus, which is greatlyincreased by the steamfrom the outer holes 0 c in the manner hereinafter described.

In operation the device is placed preferably within the smoke-stack, asshown, and live steam from the boiler introduced into the lower end ofthe cylinder A by means of a suitable steam-supply pipe 0, which maytake the steam from any desired part of the boiler. This causespropeller-wheel d to revolve, which rotates shaft 5 and arms 0 c 0.After the steam has passed the propellerwheel d it has no escape fromthe cylinder A except through inlet-holes b b in shaft Z), and thuspasses through the hollow shaft 1) and into the hollow horizontal arms ac c and out through the outlet-holes c c o in the latter. The holes 0 cc are so arranged in the horizontal arms 0 c c with reference to thewings e e that the steam in escaping from the holes greatly assists increating an upward draft at the top of the stack. The upward escape ofthe steam causes a blast and vacuum, which is aided by the draft createdimmediately under it by the wings e e.

The above device will when applied to an engine create a powerful andregular blast in the furnace, and can easily be regulated by regulatingin any usual manner the amount of steam introduced therein for operatingit. I have shown in the drawings an ordinary cut-off valve 00' forregulating the steam introduced into the device for operating it; butany other equivalent device may be used instead thereof.

I11 the drawings I have shown the cylinder A as secured to thesmoke-stack A by means of the arms A projecting outwardly and laterallyfrom the top and bottom of the cylinder A to the sides of thesmoke-stack A, to which said arms are secured by rivets; but it may besecured in place in any other pre ferred way without departing from thespirit of my invention.

I-Iavin g thus described my invention, I clai1n 1. In combination, thestack, an upright hollow shaft having inlet-openings therein, hollowarms projecting from the upper ends of the shaft and having outletopenings, wings connected to the shaft, and a steamsupply pipe leadingto the stack for rotating the shaft with its wings and arms.

2. In combination, the stack, the rotary draftprodncing deviceconsisting of the radial arms having outlet-openings, and wings, and asteam-supply pipe leading thereto, substantially as described.

In combination, the stack, the cylinder in the same closed at the topand bottom, the perforated shaft in said cylinder, the arms at the topof the shaft having outlet-openings, the propeller on the shaft and thesteamsnpply pipe leading into the cylinder, sub stantially as described.

4. The combination of a stack, a cylinder within the stack, cap-piecesclosing the ends of the cylinder, a rotatable hollow shaft arranged uponsuitable bearings within the cylinder its upper part passing through thetop cap of said cylinder and terminating in. 1101- low arms arrangedoutside said cylinder, a screw propelling-wheel mounted upon said shaft,the said hollow shaft having inletopenings and the hollow arms havingoutletopenings, and wings attached to the shaft, substantially as shownand described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

JAMES A. CLINTON.

Witnesses:

DANL. JANEVVAY, ARTHUR L. Snnnnn,

